I'd never invest in any kind of cryptocurrency, it's all basically a ponzi scheme. There's nothing backing it up, its value is entirely artificial, and eventually when no one wants it anymore then whoever's holding some loses everything. Your only value is whatever the next person will pay you for what you have.
When you purchase stocks, you're buying ownership in a company.
When you purchase futures, you're buying ownership in a product.
When you trade foreign currencies, you're investing in a country that guarantees value for your money.
When you buy cryptocurrency, you get absolutely nothing: it's entirely virtual and speculative.
Yes, some people will get rich, but that's how ponzi schemes and pyramid plans work: you're only making money by convincing someone else to give you more money for nothing. Sure maybe you want to try gaming it, but you're taking a huge risk, and while maybe you'll get a short term profit that's something I'd never recommend.