It depends on the definitions. High profit can be 10-20% or 50-100% which is obviously possible without any leverage.
20x is just crazy, non-repeatable in long term. Try to make recurring 20x few years in a row.
Blackcoin 10x then i got NAV 10x then i got NEM 20x ...
Now i bet on ICONOMI,
but my real black horse now is JWL (Jewels) // low market cap big potential those are best deals hard to lose
but to get those coins i burn a lot BTC on usless one too.
ICONOMI i rate like 2x-3x in year
i have allso MVPlineup (share) - we will see how it will go.
So far i had no luck to company shares both were scam but now i got reputable community we will see.