Doing airdrops fulltime : Is it a good idea?

Some airdrops pay really well but is doing airdrops fulltime a good idea and can it give stable earnings?

I'm in similar shoes man(if you are), I have been focused on airdrops for like three months now, since I just started and didn't make it to the top, I can't advise, I'll check in in a few weeks to give a proper comment on this.

If you know the in's and out's then doing it fulltime is an easy task. But there is always ups and downs so be prepared for that

its generally not a reliable or sustainable idea for stable earnings bcs its so unpredictability plus value Fluctuations and regulatory Uncertainty and lack of Long-term Viability

No! I would say it's a gamble. Even if you get substantial amount of airdrop tokens, it may not translate into a good money in fiat currency depending on market conditions and other shit factors you can't control.

Do you have to actually give all of your time for airdrops? Why not allocate certain amount of time like 1-3 hours a day for it and do other long term serious business rest of the time??

I was doing that for 6 months now. It can be really good if you set your strategy and use several different wallets, but it can be very disappointing as well. It's a really hard work, since you have to repeat the processes every day, you need to spend a lot of money for farming, staking, etc, need to participate in dozens of different projects and you never know what each will get you. I focused on $zksync and get around 10k at the end, but many people spent couple of years farming it and didn't get anything. With another project I spend $4k in fees only and I get back only $1k in airpdrop, so it was big disappointment. At the end, I earned something, but in the future, I will only do selected projects, mostly investing or staking, no testnet project anymore (free) because these are time consuming and you mostly get peanuts.