If I had to choose only one game that I could play all my life, I'd definitely prefer cs go. Maybe because I've been playing it all my life for as long as I can remember. Now there are more opportunities, including the purchase of cs go skins, for example, https://dmarket.com/csgo-skins/product-card/karambit-tiger-tooth. For me, this is not only a way to diversify the game, but also a good way to invest.