I have some bitcoin in my trading account, I laid with it on an exchange recently using lightning network. If it was before and I want to use the trading money to pay, I will prefer to first convert to an altcoin and use it for the payment, but because lightning network was among the payment, I used it which is very cheap.

The best way is ti have your bitcoin on a noncustodial wallet, which is a way to have complete control in your own coins. It is not good to save coins on exchanges. But I am just excited that there is something like the lightning network which can help to make transaction fee easy. I know that exchange bitcoin withdrawal fee is high, unlike the onchain transaction fee, but lightning network is helping.