Steam wallet money to paypal?

Buying market / store items to sell for PayPal funds is it.

Buy games on promotions as gifts and sell for more

Buy keys, sell keys for PayPal with reputable traders (lol) for Paypal monies, lose money in transaction fees and profits.

But it works.

buy cs go stuff. CS Go lounge and trade items for cash.

Buying TF2 keys and selling them for $1.90-$2 Paypal is the most standard and reliable option. Furthermore, there is a mini-big sale on Steam at the moment, so TF2 keys are dropping in price ($2.25 at the moment, usually $2.35+), so if you want to buy them, you should buy them now. Keys are the safest method because everyone wants them and you will surely get buyers.

Or you can do a service by selling games but you won't be able to earn as much as the Russians and may even need to sell them for a lot lesser because Russians are too competitive when their prices are 40% cheaper. And there is a risk of a troll asking you to buy a game and then disappearing.