Large Aquarium Or Motorbike?

hi i am reali undesisded i reali want a bigger aquarium coz i love fish and aquariums and all that but i reali reali love engines and cars motorbikes and was going to get a nother motorbike but heres the thing i live in town so if i get a bigger aquarium i can use it all the time but if i get a motorbike preferably 200cc i wont be able to use it as much only when i go out to the bush or a friends place. i can only get 1 or the other and reali would like peoples opinnions. thanks