There are far too many people involved in crypto now for anyone to easily become filthy rich. You now need to invest heavily and need a lot of luck in terms of investing in the right crypto at the right time. It's all very speculative.
Who would have thought by investing a few thousand into the likes of Doge just a few months ago would have made you a millionaire now? This is what I mean by needing luck in a speculative market.
I believe the next bull run will bring new crypto projects and coins into the fold.
Coins such as Theta, Cardano, Vechain, i.e. ones that have exploded this time round will be replaced by new coins.
This is what happened to the likes of Zcash, Dash etc. These coins were at the forefront of the 2017 bull market and have since not even reached 50% of their previous ATH. So if you missed the boat with the likes of Doge, Theta etc then I believe there will be another opportunity in the next bull run to bet on a new horse.
With so many people involved in crypto now, I don't think there's the same opportunity to make anywhere near as much money as the last few bull runs. There's simply too much selling pressure now. People will buy and sell very quickly in order to make just a few bucks. In order to profit going forward now, people will have to sell at a much lower price in order to front run the millions of others that want to make any sort of a profit before you do.