I'll not point it out that they are exchanges as it was mentioned by others here.
I use an offline wallet (myetherwallet), as they say.
Recently many online platform got hacked

Nah, it wasn't hacked. You guys were just victims of a phishing link and that's the problem from these people who complains the wallet was hacked but they never admit they fall for a phishing link.
I fall on that once and I know how it is, now I check the link twice before I type my username and pass, we need to get burned to know what fire is.
Even after so many threads about not keeping money on exchangers people still do it, after so many warnings about phishing links people still don't pay attention. They will learn when they lose money, I had luck and I didn't lost nothing but I learned good how to be keep myself from trouble.
Hmm, well said. It's common sense something else talking towards any object.
What is a better wallet, nova exchange or cryptopia. They look like the same but I was wondering who is faster in transferring ..
Its not a wallet. Use Ledger or Trezor any hardware wallet whenever possible. Or If you want, you can use Coinbase. I heard that they have insurance on your crypto's stored in their platform. Coinbase is also fairly safe even I'm using about a long time.