Now it’s important to note that, hodling actually comes with a responsibility of having these coins kept an away from any form of trading or providing liquidity.
If you aren’t having authorization on the utility of your coin, you are not a hodler.
You can hold your bitcoins on centralized exchanges without any trading position in a long time, it's still holding but it's not recommended by many exisiting risk factors.
Should you have your coins on an exchange, you aren’t holding Bitcoin simply because, you can’t store your coins on an exchange and the exchange could always do away with you coins. So no, the term hodler doesn’t apply to those who have their coins on some exchange.
You should not. Many warnings about risk of this action and historically many blackswan events as well as exchange deaths or scams as proofs of this high risky storage practice.
Reminder: do not keep your money in online accounts.See exchange graveyard to feel more fearful about centralized exchanges.
https://www.cryptowisser.com/exchange-graveyard/