At the financial, business level. Bitcoin may be a bubble. People buy when Bitcoin is low and sell when Bitcoin is high. Bitcoin moves from one person to another. When Bitcoin reaches its peak, the Bitcoin keeper holds the fire, and Bitcoin explodes. So, investing and trading Bitcoin is a very difficult job. Do not risk if you do not get the full knowledge of it.
I do not think Bitcoin is a bubble and you should also give proof and arguments about why you think it is a bubble. There has been times when the price has dropped to the record low position but with the passage of time, the appreciation in the value continues and this appreciation attracts more and more potential investors to invest which gives more strength to the coin. SO keeping all the things in mind, I cannot say it is a bubble.