But I think bitcoin soon will not be able to be buyer by anyone
Why do you think so? Darknet and betting sites is still around and look at the market cap. Also see the grafs, we are going stronger and stronger brother.
Cheers,
Best Regards,
If miners stop mining there there will be no one to confirm the transasction, all will be unconfirmed and pending then people will start to panic and avoid Bitcoin. Supporters will then be haters and worst everyone will look at other cryptocurrency that performs better than Bitcoin and leave Bitcoin without support. So Bitcoin will die if miners stop mining it and make the network idle.