I came to crypto not too long ago. Ever since I joined crypto, my interest has been mostly in bounty campaigns. I so much enjoy bounty campaign because it has helped me to make more money which I have never made in other things that I  am doing. Most of the times I do participate in 8 to 10 bounties at once particully for facebook and twitter bounty campaigns. So as regards the number of bounty you do at once, it all depends on you and how you think time might be available for you to participate in them. You may not even do much bounties but few good ones and yet make your big profit. Not how far but how well.