Well you could get hammered every week and piss away your -£ on booze.That moment when the 26 year old in you questions what you're doing with your money... and life.
I'd choose the Amiibo hehe. My Yarn Yoshi just arrived from bol.com and with that, I'm done with buying new Amiibo. Unless I come across Shulk. Then I might bite. But overall, Samus, Ike, Mega Man and Yarn Yoshi are enough.