So how much money are you comfortable with them stealing until they improve it?
This too will improve over time.
Yeah, except that your credit limit may be $5000-$20000 on average but one can put a ton of money into bitcoin that can be stolen. And if your credit card is stolen, many times those charges are canceled or covered. Not so in bitcoin. Big difference.
not much different than my credit card numbers that were stolen... twice. due to no wi-fi or fault of mine... it was hacked by hackers who logged into another server.
Trading seems fun, exciting, exhilarating, etc. so it has a lot of draw to it. And many people won't dig deeper than the euphoric emotion that they feel. However, trading is MUCH harder than investing. And much of the industry is bent towards getting you to trade rather than invest.