when everything about its problems will be settled, i beliave you will see the real usage of it, big merchants are waiting that after all, no reason for them to not accept bitcoin
I wouldn't say bitcoin is safe in the long term. Imagine someone bought bitcoins at 1000$ and after a few years they find out the price is at 300$, do you consider that safe? Of course not because it's not.
It could be vice versa as well imagine if someone bought bitcoins at $394 which is current rate and after few years he or she finds out that the value of Bitcoin is $1000 ? The reason behind my point is the pace at which BTC has grown