I think sharing is the most unsafe option. The market is still very vulnerable to news, manipulation and hacker attacks.

Exchange is easier.
Wallet is safer.
If you hold many altcoins by a little amounts, I think exchange is better.
If your have big amounts of altcoins or bitcoins - use wallet.

well, yes, i think that you are right and a person should choose what suits bettre for his or her own business

I prefer to keep my altcoin assets in my wallet, I think it's safer than putting my coins on the exchange site.
I will only transfer my coins on the exchange site if I will trade only because it is not safe also if we put the coins for the long term and I will move back my coins to my wallet after finished trading.
So, it's safer putting my coins in the wallet than in the exchange site.

Keeping your money in exchange wallets are some risks that we take but is not worth it, we all have heard exchange platforms get hacked most of the times with millions on dollars getting lost,. Just a show that they aren't as safe as we might might want to think. You are better off keeping your money in wallets where you have total control over them, and you can encrypt then whichever way you want

If your tokens are ERC 20 or  NEP-5 and You going to long hold please use hardware wallet this is the best way for safe your funds, Exchanges have a secure method but most of the exchanges got hacked, If u need to long hold you should use hardware wallet Ledger is the best option 

Very risky to store your entire assets in exchange wallet for there are instances of hack activities. Once your wallet hacked everything will absolutely gone. Better you have full assurance of gain and not about the loses at the end. So, take care of your assets to make it meaningful when time comes.

I think its safe and no problem so far and i can doing trading faster if i want to . I been using mew too and its good and safe too. The point is you need to know where you store your coins, you need to know who they are who hold your coins so it will be safe.

Truly that is the con of having our coins in our wallet in light of the fact that occasionally we extremely missed the pump and I wager everybody realized that inclination. Be that as it may, if our coins are in our wallet we don't have to stress if the trade gets bargain. So it's a win or lose circumstance for everybody