not really in a crazy sense, but bitcoin has become very popular. after going through the process of 9 years, bitcoin has increased very rapidly.Then sudd2bly it goes down again and people don't know what really they will do. Its like a gamble that makes us crazy.
Its making the world crazy because it will make you rich in a short period of time. Compare to investing in bank it will take many years for your money to grow, but in bitcoin investment, you just need strategy and timing to gain big amount of money. Just remember the common stategy, buy and sell. Buy btc when the price is low and sell your btc when the price in the market is high.