If You are betting that BTC price will increase, you would be better off just converting cash to BTC and holding it. ;-)
I have yet to have invested in anything BTC related where this wasn't the case. :sigh:
I managed to ride a few AM fractionals from ~0.5 BTC to ~4.4 BTC (full share price) ... wish I'd have been "all in"
This BTC investing lark though, you either need brass balls or crystal balls.