Dealing in stock market isn't playing safe either since you also deal with volatile market movement, though at the level of crypto volatility. And people will feel a lot more secure since these are real life assets that they're investing on. That's the differece and that's why it's quite more stable than crypto market.
Good points, and I would suggest that cryptos don't pay dividends. Yes, there are POS coins with which you can earn interest, but I don't think most of them are even worth buying to begin with, because nobody is going to be using them for anything. There's no barrier to entry to creating a new coin, and there are already too many of them. That's not the case in the stock market, not even those shitty penny stocks of shell companies (though I would stay far away from those).
Stocks represent businesses, and their value reflects the health of the state of business and the economy in general. Crypto? So far it's uncertain what it correlates with other than supply and demand. I'd much rather stick with stocks than crypto, because I view buying crypto more like buying a lottery ticket. Stocks do have a long history, and I'd prefer more predictability and less volatility for the long-term.