I am from such a country where online wallet not regulated.Coinbase is free of cost and confirm the transaction within a minute.I am happy to use it. If any other problem have let me know.
It could get regulated in the future, doesn't matter which country you are from. They will have everything on record if you continue to use Coinbase.
Plus, I've read multiple stories of them freezing or terminating accounts of people, so I personally wouldn't trust them.
The fees you pay when using other wallets are just part of Bitcoin and it's not that much, I'd rather pay them than trusting Coinbase (or any other online wallet) with my coins.
any suggestion which site i can be used for it?
Anything that is not gambling or anything illegal. Even so, they reserve the rights to edit their terms of service and can suspend your account even if nothing is wrong with it.
Blockchain.info is no better than Coinbase and is actually a lot worse.
Coinbase does have a significantly better track record as compared to Blockchain.info and that is the reason why you should ABSOLUTELY avoid using Blockchain.info AT ALL. They are not competent enough to test their software for any bugs before releasing it to the public.
That being said, Coinbase controls your private keys and thus controls and records EVERY of your transaction. Your privacy is now compromised. Sure, they are trustable. But the fact that they can track all your transactions defeats the purpose of Bitcoin. Try using a desktop wallet like Electrum. I am sure they can provide equal or even more security as compared to coinbase.
Do you care about having your account blocked, privacy compromised or paying a small fee (eg. 0.0004BTC) for every transactions?