I've been testing Over Protocol for more then 7 month's and i got 75 OVER airdrop.... thry worth (15$)

But for VANA Testnet I've spent 1 day just for fun and i got 1.20 VANA. (32$)

Should i continue spending my time and focusing just on one protocol like i did with Over Protocol? F... Over Protocol 

It's great to see your experience with both protocols! Sometimes trying out different options can lead to unexpected results. It's important to weigh the benefits and decide where to focus your time based on your goals. Good luck with your decision!