It's just market cycles really. Towards the end of the cycle (at the top), you get more risky moves which pushes everything higher and everyone's euphoric and then boom goes the dynamite.
We covered this in a different angle though here: https://steemit.com/bitcoin/@ledger256/do-you-know-when-the-next-market-correction-is-of-course-you-don-t
right. you know the drill!! thnx.