Atomic wallet was hacked some months ago that led to loss of over $100 million. Is that the wallet you still prefer to use to stake coins? It is better you look for other wallet that you can use.

Atomic wallet is selfish. It only have one validators which is Atomic itself.

If you go to Trustwallet, you will know what I am talking about. Like the Osmosis that you talked about, you will see Atomic as a validators and you will see many other validators that you can choose from. Trustwallet is not an open source wallet and you should not know that.

If you want to stake coins like Osmosis, the best wallet for it is still Keplr wallet. It does not fail like Trustwallet and having many options if validators.

If you want to gamble with altcoins, you can also stake them in the process of holding them. But know that you will have to wait for some days before you will be able to have access to a coin after you unstake it.