They possibly can. Nearly all of them are in China, and nearly all of them are owned by a single company that manufactures the ASIC processors that do the mini

They possibly can. Nearly all of them are in China, and nearly all of them are owned by a single company that manufactures the ASIC processors that do the mining. This is why I'm not a bitcoin maximalist and I'm not a huge fan of it. I have a suspicion that eventually it will fail.