It's slowly becoming mainstream. Now PayPal takes it for investment (as of last week you
can't yet send it to other people through them) along with AT&T, Microsoft and others:
Who Accepts Bitcoins in 2020? List of 20+ Major Companies No less "safe" than a lot of stock market investments but def a lot more volatile. People are often afraid of things they don't really know a lot about. Yes, there is a lot of shady dealing that go on using crypto but that could be said for cash as well. You aren't responsible for what others do. I wouldn't invest now though as it is up over $15,000 per coin almost triple of a few months ago. $1,000 invested in 2015 would be worth over $75,000 today.
To the OP,
easiest place to deal with crypto right now is COINBASE as you can buy, sell & trade using your debit card. If you're looking at PayPal for Crypto, don't at this time.