Here's a summary since people have probably gotten exhausted or just stopped reading, so I'll probably stop monitoring this thread:
1. Is crypto safe? Answer, it depends on what you invest in. If it's meme coins, no, it's not safe at all. If it's the top 10, aka the blue chips, then it's reasonably safe as long as you are responsible in your investing. Follow the charts and not the herd and stay contrarian without emotion. Trade as little as possible and think long term instead of going for the quick buck.
2. Is crypto a pyramid scheme? Answer, no. For the largest coins, they trade mostly in centralized exchanges (CEX), e.g. Coinbase or Binance, that operate in the same way the NYSE operates in all the important ways. Many tokens can usually be found on decentralized exchanges (DEX), such as Uniswap, Pancakeswap, or Jupiter where you trade one crypto for another. To facilitate that, there are many stable coins that maintain a 1:1 value to the US dollar (or other currency) with the major ones being USDT (aka Tether) and USDC (aka USD coin). The major CEX's will follow KYC (Know Your Customer) rules to ensure security and provide tax documents at the proper time, just like most brokerages.
3. Is crypto riskier than stocks in general? Answer, yes, because of the size of the market. The entire size of the crypto market is similar to the market cap of Apple, a single company in a vast stock market. By definition, it is more volatile and carries a higher risk. Crypto is still in its infancy, being only 16 years old and may not be for the risk averse.
4. Is crypto a scam? Answer, it depends on what you invest in. If you're solely investing in meme coins, then the probability is high you will lose money. They have made millionaires overnight, but only if you're incredibly lucky. It is equivalent to buying a lottery ticket. Expect to lose your money but be surprised if you don't. Most meme coins go to zero at some point, but typically due to lack of interest. There are the occasional rug pull scams where the token either fails to reach the exchange or the creators of the token sell their initial supplies at the token's IPO, driving it to near zero. If you're investing in the top quality cryptos, unequivocally no as all the big investment houses are in the process of going all-in on crypto, beginning with Bitcoin and Ethereum and moving to other coins. The SEC has approved spot ETF's (Exchange tradable funds) backing Bitcoin and Ethereum with applications being made for Solana ETF's and other top coins. There are also Bitcoin Futures ETF's. ETF's are alternatives for investors who do not want to maintain their own crypto wallets.
5. Fundamentally, do crypto coins have any assets backing them? Answer, it varies a great deal. Nothing backs up meme coins and many little known alt coins. For many coins and tokens, there are substantive businesses behind them that have business plans that can be examined in detail. Many of those businesses use crypto as their initial funding mechanism instead of a stock IPO. For instance, I invest in tokens by two AI companies that provide infrastructure for generative AI in very similar ways NiceHash does. Many layer 1 blockchains support thousands of businesses that build themselves on the blockchain. Most of those businesses built themselves on the Ethereum layer one or layer two blockchains with an example of a layer 2 being Base (built on Ethereum), a chain backed by Coinbase, a large company on the NYSE. A solid business example of a Base token is Aerodrome Finance (AERO), a business finance company providing liquidity to the markets. Ondo Finance (ONDO) is a major RWA (real world asset) firm built on the Ethereum blockchain. Many businesses are beginning to build themselves on Bitcoin, Polygon, and Cardano with other coins being used to a much smaller degree. Many NFT traders operate off of Ethereum and an equivalent is building on Bitcoin, called Ordinals. One upcoming layer 1 blockchain is SUI. One of the older blockchains is Binance Coin (BNB), backed by a huge international exchange, Binance.
6. Can crypto be used as a currency? Answer, yes and no but mostly no. It vastly depends on the coin. To be a good currency requires speedy transactions, stability of the blockchain, and low fees. Dogecoin makes for a good currency, but Bitcoin does not since it suffers from slow transactions and high fees. Ethereum makes for a horrendous currency with fees often topping $100/transactions while averaging $30-50/transaction and sometimes glacial speed. Solana could with its lightning fast transactions and negligible fees, but has a stability problem, going down for hours on occasion. Once Solana fixes its stability issues, which the next major update promises to do, then Solana could become the best possible currency alternative in my book, if the stability fix works. Most cryptos do not make for good currencies since most suffer deficiencies from one or more of the three requirements above. Monero is known as the privacy coin where transaction records are not visible on the Internet. One interesting thing about coins like Monero or VerusCoin is that they can be CPU mined. The rest are completely transparent with all transactions easily readable on the Internet. That allows authorities to track down potential criminal activity.
7. Are Bitcoin and other crypto legally a security or currency? Answer, no in the US, despite the full name of the market being "cryptocurrency." Multiple courts in the US have ruled that crypto is not a security or currency but is rather a commodity. The SEC's official position is that crypto is a commodity, though I've pointed out inconsistencies in its actions. Because crypto is not a security, it is not subject to various laws such as the wash sale rule. The main difference in crypto's classification determines what laws apply to the crypto market.