If they print money to keep the btc price low, then we print tether and buy more bitcoins. Get rekt.
That becomes a problem though the minute everyone wants to get out for real fiat.
Fractional reserve bitcoin market == bad.
That's the beauty of bitcoin. It is easy to enter but hard to get out.
Many people are afraid to get out because of the paper work waiting for them. (or the questions from the FEDs)