Big gains are possible but also improbable especially accounting for human nature.    When the figures get big you are more likely to trip yourself up, the idea of do nothing I agree is your most likely chance of success but thats also similar to buying a lottery ticket and hoping, its not generally productive.

I'll repeat what I've heard professional traders say which is to handle it one deal at a time.   So you are very ambitious in wanting 10x appreciation, thats your first target.     If you ever achieved this you should take back your original stake, the likelyhood of not losing out at some point is too great not to do this and ensures you never reset to zero.