Is there any difference between coinbase, myetherwallet and blockchain? Which one is better in your opinion?
Yes. there is a huge difference. Coinbase is a service really, not a wallet. You never really have control over your bitcoin if you store them there, since they own the private keys.
MEW is pretty solid, but only for ethereum. Although i believe the official ethereum client has way more features then them.
Blockchain.info is a webwallet, they have no access to your keys, but neither do you (unless you export them, which is almost impossible. ( or derive the seed ofcours, which can be buggy.)
It also misses a lot of functionality if you compare it to something like
https://electrum.org/#homeI had no idea. It's good to know about these little nuances that make the difference. Thank you!