Don't invest in what you don't understand is the #1 rule of investing. If you jump off the deep end without knowing what's at the bottom, you are at a high risk of losing what you put in. New technology always comes with this risk. That's kind of why most don't touch crypto - its far too technically complex for them to even comprehend the risks.
If you've followed crypto and blockchain for long enough though, you realize that the risks are high and the value is low. It's a shitty technology, and a shitty investment. The cryptoverse is filled with volatility, no real-world "thing" to tie value back to, and scams upon scams.
Blockchain is an innefficient, energy-guzzling excuse for a database. Oh but you forgot its decentralized So what? Most applications don't need decentralization - it makes them inefficient and slow. Why do you think the general trend of the world has been centralization into hubs, cities, and services? Here's a nice refuter of the blockchain hype:
http://doyouneedablockchain.com/
And of course, the classic: