Thanks all.
I went out of the Monster Fish Game for a while and got into Japanese Kois (beautiful and magnificent in their own way). But I just could not stay away from Arowanas. Now I keep both Arowanas indoors, and Kois outdoors.
With regards to Monster fishes outgrowing my tanks, Just remember my motto:
"There is always a fellow hobbyist with a Bigger Tank."
Enjoy and keep the comments going.