Some airdrop are really profitable, you just have to find the right one, suscribing to one is quite fast so i suscribe to all of them, got some nice profilts until now

Why you want doge to be at more than one dollar ? it's just a meme coin 

The best strategy is always to diversify, so pick a few altcoins you like after researching a lot about them then throw a bit of money in each of them ^^