A whale buying does not mean its a good strategy. You might left empty handed if you buy after them once they take profit. Remember that there's a lot of big private investors out there that doing same trading as this institutional investors, The problem is they don't announce publicly there trading activity so they might dump on Microstrategy pump if they are already in profit from recent price fluctuations. It safe to buy when everyone is fear and don't buy if whales showing us a signal to buy because they are just doing it for there self interest not to let shrimp traders have profit.