The US government will be in a very difficult position, if the corporates dump their US treasury bonds and replace them with BTC. This can't come at a worse time for them, as the Biden government is about to finalize the $1.9 trillion stimulus. If there is no demand for US treasury bonds, then the government won't be able to take debt at low interest rates, although such a scenario looks remote now.
Right now, none of the other corporates have announced that they will sell their treasury bonds. The demand for these bonds in the market remains quite strong, and as such the government doesn't have anything to worry in the immediate term. But in the long term, there is a strong possibility that the demand for treasury bonds may subside if the interest rates are much less adequate to make up for the fall in purchasing power.