Exchanges are meant to be used for treating coins, not storing them, so there is no point in leaving them in an exchange.
 
If I use any centralised exchange today to buy bitcoin, the only purpose for using that is to buy it, and that's where its service ends. Storing it is my personal responsibility, so I move it to my private wallet (self-custodial wallet), to be precise.
 
I don't leave bitcoin in any exchange, but I leave some funds in some exchange as a result of me using them to place a buy order, which I don't expect them to execute at that very moment. Only those funds on an active order are what I leave in an exchange; the rest of them are moved down to my private wallet.
 
Not your key, not your coin.

It's safer to store it in your wallet, where you have full control over it, than to keep it in a place where anything can happen at any time, such as fund freezing, hacking, bankruptcy, etc.

Most of my Bitcoin is stored in my non-custodial wallet. I only have a small amount. It's in a hot wallet. I know it's risky but at the very least it is non-custodial and open source. I also have small amounts in my gambling accounts. It's for betting, mainly sports betting but I also sometimes bet on dice and other casino games, especially during times when I don't have anything to do. Right now I don't have funds kept in a centralized exchange. I don't trade often. If there's a need to do some trades, that's the time I will send my funds. It is especially discouraging recently with the fees rising so high.

Centralized exchanges give you a wallet too but it is a custodial wallet and centralized exchanges own the wallet private key, not you.

By saying "Store all your BTC in your wallets", contextually you meant it is non-custodial (self-custodial) wallets and you own those wallet private keys.

Reminder: do not keep your money in online accounts

Because of this risk and also risk from trading, that we should not use all capital for trading. Like using 10% of capital for trading to have good risk management, it means we should not store more than 10% of our capital on centralized exchanges.

My ratio:
0% in exchange.
100% in wallet.

Because exchange is only to trade, not as a place to hold your coins "Not Your Keys Not Your Coins".

Both are equal, you're still using someone else product. It's hard when you create your own cold storage from scratch. But Trezor is better than ColdCard because Trezor is open source while ColdCard isn't.

Yes, I leave some percentage of my BTC on exchange for emergency purposes or personal needs which could be loading of cryptocurrency virtual debit card with funds, and quick accumulation based on the opportunity presented by the market.
Meanwhile, the ratio is mostly 1/4 while sometimes it depends on the important is things which I planning to use the crypto for.

I would never leave a single Satoshi on an exchange. Usually I just leave some shitcoins that I buy hoping to sell them for a decent profit, so since I place a limit order I need to keep them on the exchange but, at the same time, their value is not very high so in case something bad would happen I can take the loss. Of course I don't use any small exchange.

The only Bitcoin I leave on exchange is something I will like to use for trading, I don't like leaving anything on crypto exchanges but due to transaction fee I am now used to leaving some Bitcoin on exchange, not enough to hurt my feelings if anything goes wrong.

I also like looking at mempool to know the exact amount required to send or withdraw some Bitcoin, like yesterday it was just $3 and it's been months that I saw this price range for Bitcoin last, whatever you choose to do always make sure it's worth the transaction fee, either sending or withdrawing off a crypto exchanges.

I know it's not safe to store your coins on exchanges but 0%, it is unbelievable.

It's hard to find people who don't trade on exchanges and 0% trading in this market is very rarely to find people like this. Maybe you are different.

Decentralized exchanges can be one of choices for trading without storing coins on exchanges but they are not too convenient.

It's only good option now if you receive your bitcoin from signature campaign payment and know that you will need to sell it to stable coin or cash to use. If you know you don't need to touch those coin next like 3 months or 6 months, it's not a good option.

Keeping all your coins on an exchange is kinda asking for trouble.  Exchanges get hacked and stuff gets stolen more often than people realize.  Use exchanges to buy and sell coins when you need, but don't treat them like banks.  Keep most of your holdings in a separate wallet that you control and  that way your nest egg is safer if the exchange goes belly-up. 

Exchanges are handy tools but they aren't meant for storage.  Use a secure wallet for that.  Transfer just what you need to the exchange when it's time to trade.  That's the smart way to go about it.  Minimizes your risks.  Keep the core stash safe in your own wallet that only you control.



Why would you even consider another hardware wallet if you haven't even tried the one you already have? What's stopping you from using your Trezor hardware that you already own right now?

When I was still new, I thought that it's okay to keep all my btc's in exchanges. But thanks to the people who have been concerned and endlessly reminding everyone that it's not safe to keep your BTC on exchanges, they've just learned their lessons from the cryptopia and other exchange debacles where most of the BTCs that have been deposited with them have never been returned or if they were, it took time for the retrieval of it. And that from then, I've learned that it's best to keep it on my wallet and that's what I've been doing and passing the info that I've learned from them to the newbies that if you're going to store some money on an exchange, make sure that they're just actually for trading and not for long term holding.