Elon isn't just a random guy. It's not for nothing that he has succeeded in his auto endeavours. He's an influential billionaire with a modern day touch. Isn't he the wealthiest man on earth at the moment? We should be in awe if his action shouldn't spark a kind of reaction on any issue, especially tech ones. A lot of investors trust his sense of judgment, seeing his electric cars and the wonders he has been able to perform there at a time when it is almost impossible to have such autos run on earth. Putting Bitcoin on his profile shows support and that means he too should stack in possession. If he has, that means (by conclusion) Bitcoin is an investment worthy to make. I guess all that factored in is the reason for the sudden bullishness in Bitcoin. That's quite understandably.