You missed a point. Learn to use a crypto wallet to store your crypto and wallet should be non-custodial.
Use exchanges and their custodial wallets to store your crypto are not good. You can say I am trading everyday but the more exposure your crypto currency have with exchanges and Internet, the more risk to be stolen, hacked. Exchanges can be hacked and not all of them will do compensation for you. Some exchanges do scam and exit and some of them abuse hacks as reasons to file up bankcruptcy and exit.
The article is good but I don't like what they missed. They should tell readers where to start, search and choose exchanges: coinmarketcap, coingecko. They only mentioned some big exchanges they like (who knows any beneficial reasons behind, sponsored article by those exchanges)
If newbies want to search exchanges, I would tell them to try with
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https://coinmarketcap.com/rankings/exchanges/-
https://www.coingecko.com/en/exchanges-
https://www.coingecko.com/en/exchangesStore cryptocurrency in non-custodial wallets, save private keys or seeds.
Make deposits to good exchanges to take profits
Withdraw your crypto, fiat or stable coin from exchanges after your orders are filled.
It is a best approach, first for security and safety of your asset, second not all traders get profits from their trades.