The easiest and most profitable strategy for earning crypto-currencies is the purchase of altcoins that recently have been listed on crypto exchanges.
I usually find them here
https://coinmarketcap.com/new/ I salute those people who can do trading and their job together, I hope that I can do them as well but unfortunately I cannot due to toxic of my schedule in my work, most of the time especially during month end I am rendering 9-13 hours straight working in a day so I cannot find time doing trading as I don't have idle time in my work.