Your suggestion of mining Bitcoin is still going to be the best option but but, that is you have a real passion about mining since it wasn't easy and it isn't cheap. There were lots of stuffs to be considered first like location, space, weather conditions in the area and so on.. before one can effectively make Bitcoin mining a somewhat profitable activity.

Stayaway from connecting your wallet to multiple garbage Sites people Maybe check the project first research its community and check the backers Most project dont ask to  connect wallet to collect airdrop just like that. If you follow and read these crypto project I think airdrops comes naturally So dont fall victim into clicking useless links

I have 2 BNB, what is a good project to invest in? Something with utility, no shit coins

Beside these scam airdrops , there are some airdrops which gave me a lot of money, as I can say about the Maverick that was previously launched and give users some profit, and also Arbitrum Airdrop, and recently Optimism gives its users a massive airdrop. So, scammers are everywhere, we should take care along with doing any airdrop.