I got your points because of the unknowm future after buying bitcoin but, I believe buying Bitcoin is far from gambling.  The reason for this is that we can research early, before buying Bitcoin, we have control on when we will enter the market which is pretty logical.  Even after buying Bitcoins, there are lots of option to minimize the risk and or completely nullify it.   Unlike gambling that we all have only one option but to wait for the result of the "roll" after betting.