Currently there are many types of coins with different chains, and there are many tokens built on top of each network. that is why in the article it is mentioned you must have multiple wallets
You can install multiwallet applications such as mathwallet, trustwallet, imtoken, etc. with one application you can manage many addresses with different chains.

I really like the way you learn, starting with reading, then asking questions you don't understand. Becoming a bounty hunter even though it looks free and the risk is small, it takes perseverance, patience, and thoroughness, because we dedicate time and energy to support the project. There are risks that we must be prepared to accept, such as cut allocations, delayed payments, and even scams.