Can you have blockchain without coin?

Bitcoin debate: RBI says blockchain can exist without currency , crypto world divided. … As a result, public blockchains are immutable i.e. data once verified cannot be altered. Bitcoin, which debuted in 2009, is believed to be the first implementation of a public blockchain technology designed to allow anyone to join.

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Is Bitcoin the most secure?

From the standpoint of cryptography, Bitcoin is very secure and extremely hard for someone to hack. The record of transactions cannot be changed, and this is what makes Bitcoin incredibly secure. But, since these records can be viewed by everyone, Bitcoin is definitely not the most private cryptocurrency out there.

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