Well, that really should be enough for anyone who has been paying attention to Microsoft shenanigans over the last 30+ years, including to those who are ostensibly their partners, when they get interested in a technology (and no, JJG, I'm not talking about spying though they do that too). It's all very well documented so I'm not going to go over it again. I'm sure there are many good search terms that will provide information in infinitely greater detail than I could in the time and space they have available.

Would they be able to do much damage to Bitcoin? Likely not long-term but they're certainly big enough to cause some pain.