How many coins are still available to mine? I'll probably buy more BTC to hold once there is 10% left. $6.5k value is still high at this current rate, let's just hope that its market value still goes down or at a perfect range in order to gain a good amount of profit thru holding. With the mining difficulty keeps going higher, we are still long way to go from what we are expecting. Let's also consider the coins that are circulating in the market, there are those who were moving and others are probably stored (holding). Still, there are a lot of parameters to hit my or each investors target, if this won't happen, I'll probably looking to hold coins (replacement to BTC) which has the similar potential of Bitcoin.