Security is extra guaranteed

Yes this is one of the most important part of blockchain. A safe space for all even though it is decentralised and most things can be seen or accessed by all.

When processing transactions, the rate is constrained, most effective 4.6 transactions consistent with second, so it's miles confined and relies upon on different networks to make transactions.

Yes blockchain is not too fast especially when the number of transactions are too many. But the of 4.6 per second belongs to btc blockchain.