These guys single-handedly raise each person's confidence in buying bitcoin. If you are a newbie looking to buy bitcoin but is hesitant to do so, then you stumble upon an article outlining how Microstrategy continues on buying bitcoins in huge volumes despite negative market sentiment, you'll also be compelled to buy because you might think there is something they know that you don't - and it just makes sense even if you don't know what exactly that thing is because they just keep on making money.
What I only fear about MSTR doing this is that they will become too big to fail, or that one single mistake on their part can send bitcoin's price crashing down into levels that we left a long time ago. There will be a time when MSTR is just controlling an absurd percentage of the market and there's nothing we can do about it.