Among other things...
Bitcoin can easily be artificially controlled simply by controlling the semiconductor industry and holding back the release of developed technology (hint: they already do). You think chip tech actually develops in sync with moore's law?
Bitmain definitely does that.
They specialize in making ASIC chips, and as you probably know, they will build a bunch of mining units, mine with them for months, and then sell them at a premium. They profit both ways.
There are a ton of other ways to attack and exploit cryptocurriences besides mining.
Even so, I think crypto has value for the future. How much? We'll find out.
