I read somewhere that your BTC are less at risk if, instead of keeping them on your BTC account (say at Bitstamp), you transfer and keep inyou PC wallet (say Electrum), until you need to use them.
Is this true ? (if there is a simple answer to this question). Thank you !
Giving you a simple example : -
When you open an account on an exchange,your money by default is stored into their wallet.The wallet you don't have full access to.They have control over your funds as technically,that wallet isn't yours.
By keeping your coins in a wallet such as electrum,you get full control over your bitcoins.
If the exchange gets hacked or just what if the owner decides to run away with your coins stored on their wallet,you cannot do anything.Simply because you never had control over that wallet.
If the wallet is locally installed on your PC,unless someone hacks your computer or you lose the keys,your coins are always safe.