Bitcoin is a financial bubble because of its high volatility. Bitcoin bubble will be repeated over and over again.Basic finance theory says that if there’s no way to invest and profit from an asset's decline, the price is determined by the most optimistic buyer. If some traders think Bitcoin is overpriced, but have no way to bet on their belief, they will just sell their stake and sit out of the market. Everyone who remains will be an optimist, and they will buy Bitcoin for the high price they believe it’s worth.