This doesn't make sense for a number of reasons. Firstly: The company has no competitive advantage buying bitcoin. If investors in this company wanted to buy bitcoin there's no reason not to just pay a dividend and let the investors buy bitcoin.
Secondly, investors can now no longer invest in MicroStrategy - since the value of your investment in MSTR is now 2/3rd determined by the performance of MSTR, and 1/3rd determined by the performance of bitcoin. Essentially attaching a hugely risky bet on bitcoin to a business analytics company.
Thirdly, even if you do buy their contention that USD is going to go to 0 (which is a wild contention) there are other assets you would buy. Commodoties, Foreign currencies, real estate - hell even Treasury Inflation-Protected bonds would all form part of your portfolio.
Fourthly, you're signing yourself up for this enormous risk of owning bitcoin. You've essentially put a $400m target on your back saying "If you can compromise our security, you could have half a billion dollars!". Now obviously security is important in all asset ownership, but most assets have far more reputable people willing to offer services to secure your possessions (like a bank).
On the other hand though this does make it nice and easy for the CEO to disappear off with half a billion of his investors money in his back pocket. I'm sure glad those investors are in safe hands though - this would be really suspicious if the CEO had previously had to settle accounting fraud charges.