Depends on how much data you&#x27;re trying to add to the blockchain. If its small enough to fit inside of a single OP_RETURN transaction, Bitcoin might be enough. Anything larger than that and Ethereum is a clear winner.<p>Another important thing to remember is that Bitcoin has a block time of 10 minutes. That means that once your user submits data to the blockchain, they need to wait ~5 minutes for even 1 confirmation.<p>Ethereum has a block time of 12 seconds.