Well it's kinda worth since etherium is worth more over time and you sell your axies more expensive than you bought them (if you for example bought one for .4ETH and sell it for .45ETH and etherium is worth more as well than made some money). But it isn't worth for making money by playing a game since it isn't really fun after some time if you didn't buy good axies (they cost at least 4k each) and you have to invest a lot of time into it. I made my 10 adventure matches and 5 wins in arena without any losses and it still took 1 1/2 hours to get my daily bonus. (I mean... I had the worst axies but even with better axies it would've taken at least 1h)
