The thing is it doesn't matter whether there are a few miners or a lot. Bitcoin will continue to mine a block every 10 minutes. It's like an energy sink, you can drip in tiny amounts and get the same, or you can pour in all future fusion power plants, you get the same.
So actually it won't affect bitcoin, but it will release the energy to other uses.
So actually it won't affect bitcoin, but it will release the energy to other uses.