It's really a shame how deflation tokens faded away so fast, the use case never lasted for long, the kinda failure from STO projects too, some use cases are just not going to work in crypto space I guess, burning off tokens when making transactions sounds cool but not just a good reason to invest in such projects, not a good utility for a real asset.
If you see stats of deflationary coins like BOOM, one thing you will notice is the volatility. On one day the market volume is in million while on other day it is in thousands. If we carefully buy deflationary coins at dip, there is fare chance of getting good profit in short run. They are good for day trading.