Bitcoin is also money printed out of thin air. Bitcoin is also a fiat currency. It may be impossible to change the rate of Bitcoin printing, but it's definitely possible to print more cryptocurrencies (see Ethereum, Monero, Solana, Tron, etc), it's definitely the case that bitcoin's non-deflationary nature is terrible for it as a medium of exchange as it encourages hoarding and destabilises the value, and it's definitely the case that it's impossible for any currency with a fixed issuing rate to maintain a stable value.

Is monopoly money a threat to the dollar? Does Hasbro need to report to the Fed how much it has issued each year?

People will only hoard hard money until they need to buy things after they've run out of the state's fiat tokens to try and sell.

Look up Gresham's and Thier's Laws