Here are some of my thoughts and observations after 7 years in this space.
No, also: you don't have to buy a full Bitcoin. Don't invest money you can't afford to lose or might need soon. This is a risky investment.
Even if you decide to buy Bitcoin now, in a couple of years people will tell you that you just got lucky.
If you're already not 100% convinced if you should trade or not: don't. Even if you're 100% sure that you should trade I would still advice you not to. The majority of the people lose
No, those who can't trade for themselves, teach (or run paid groups) since that's the only way they can actually make money in this space
The most important things are:
- stick to your plan/strategy
- surround yourself with a couple of people who are at a similar (or bit higher) level than you. These will be your best friends in 4 years.
That's up to you, most people get burned buying altcoins and lose a lot of money.
Bitcoin is the default currency, if you trade altcoins and end up with more USD but less BTC. You've lost money.
Sure, V. wants to sell you his heavy bags. Truth is that PoW is actually incentivizing the deployment of more renewables sources and helping build its infrastructure.
The bigger the blocks, the more centralized the cryptocurrency. This should be an obvious one.
Block space is a scarce resource which use should be optimized. Many exchanges fail doing that.
A question you should ask yourself is if your coffee $2 purchase should forever be stored on the BTC blockchain.
Reason that there are so many scammers is because you're dealing with money and non-reversible transactions with a certain level of anonimity.
The obvious answer is "no". Some would say that if you can't take care of your own private key management you shouldn't own Bitcoin. I'd suggest to buy a hardware wallet. But if it's a small amount, it's fine, as long as it's a good exchange.