A lot of people use them for profit - the most viable way is to plant 30k bell bags (which give you a 30% chance of getting a tree, I believe?) and you can make 60k profit.
They're also a sign of wealth and status![]()
That is a bad gamble because if you plant 3 30,000 bell bags, you have a 34% chance of not getting any bell trees, a 44% chance of getting 1 bell tree just to break even, a 19% chance of getting 2 bell trees, and a 3% chance of getting all 3 to produce bells. The only purposes of bell trees which I can think of are that some people might like how they look and if you bury 1,000 bell bags instead of regular saplings to make regular trees, you have a chance, albeit a really slim chance, of getting some unexpected bells.
Yeah I always assumed it was to flaunt your riches a little bit. Y'know, cause you're so rich it's like your money grows on trees? And you're also rich enough to throw money away to make that happen?? Totally
If you plant 99.000 bells, after a few days you'll get three bellbags of 30.000 bells. if I remember correctly. Only once!
I honestly don't see the point of having a bell tree.