I live in Southeast Asia, is it suitable for me to keep a hermit crab as a pet?

Southeast Asia is very humid but rather hot.

YES you can, here are some basics:

To live comfortably in captivity, hermit crabs require the following:

Temperature no lower than 72°F. Consistent low temperatures can kill a hermit crab. Don't allow them to bake in a window, either. If they get too hot they will die, and overheating causes irreversible damage and a slow, painful death. Signs of overheating are a musty smell and discharge of brown liquid;

A constant humidity level of at LEAST 70% humidity. Try to remember that you want the inside of your crabitat to have a moist, "tropical" feel to it;

Substrate deep enough that the crabs can bury but not so deep that it negates the effects.

well i guess since u live in asia, nothin isn't wrong with having a crab as a pet although alot of people still have crabs as pets

of course there are hermit crabs native to the area. They love hot, humid environments.

yup,

there are a few hermit crabs native in southeast asia.. Go to the beach and catch some and put in your aquarium.

yes they make great pets... although they really smell.

Certainly!! I live where it is very hot and humid, and they are sold in pet stores here.

Sure. Hermit crabs need humidity to live.