Investments are all towards either preserving your value or gaining profits or even both. However the best I can say about crypto investments is that it's one of the easiest and most accessible form of investments. A couple of other investments requires you to understand some technical economics and concepts of inflation to be able to properly profit off it.
However crypto investments are far easier to attain. Crypto currencies are very volatile and it's up to you as the investor to use that to your advantage making use of simple economic concepts. The biggest problem I see in crypto investments is security. It's more difficult to secure your crypto investments properly than it actually is to get them. The internet comes with a lot of risks that can make you vulnerable that's why one has to take security very seriously in crypto investments.