Currently, there is a debate surrounding a bubble in Bitcoin and other cryptocurrencies. The website coinmarketcap.com lists 1,097 distinct...

Currently, there is a debate surrounding a bubble in Bitcoin and other cryptocurrencies. The website coinmarketcap.com lists 1,097 distinct cryptocurrencies, many of which have no market value. Which of the following is a common theme surrounding financial bubbles? 

a. Valuations related to long term fundamentals

b. Investors seek safety in Tulips

c. Liquidity

d. They emerge around technological innovation