Re: What will happen if quantum computer owners start to move the early mined coins?
But you shouldn't fear from quantum computer. It is still hard to hack any crypto wallets. And also quantum computers can mine cryptocurrencies faster than ever.
The time interval does not change 
and the price is not affordable to built a Quantum Computer to mine BTCitcoin and even if someone creates i doubt it will be able to overpower all the hashing power around the world and hence it is an impossible task. If someone is creating specifically to mine BTCitcoin then he must be really crazy and have a few millions at his disposal.Of course, we're talking about a possibility here. But a person's probability of owning a quantum PC for mining is always more likely than trying to hack a Bitcoin wallet. If I had a quantum PC, I'm sure I'd use it for much better things.