i think you could invest this bitcoin into alt coin mining as this will give you profit
It is quite risky to invest in the altcoin mining. The mining difficulty is rising fast and the price of altcoin is not rising.
the price of altcoin do depend on its usage and demand , when a coin do not have any usage in the market then the price of it do not increase while if there some need occurred in the market for its usage then the price of it increases.
That is right. The Monero has found some usage in the dark market, so the price has risen quite a lot recently.