Bitcoin won't drop drastically. There are institutions that are involved now, and they'll ensure it stays high. That way they've more investment capital etc. The reason it's worth so much is because banks and such now see BTC as a proof of value or wealth. Much like owning gold, we as people can make anything valuable and we often do. This version is just a digital currency, previously it was silks, spices, rocks, coins, mentals etc.