I think too late to enter the bubble tea scene, too saturated. 4 years ago, I also started my bubble tea shop at KL, Wisma Cosway, but close after 6 months cause dispute with my insane partner. An *******. Then I have wanted to open one in Sg but then didnt get the approved license to operate in a friend's palce. Fire hazard issue.
However, looking at the competition now, we have Gong Cha, Cup Walker, Koi Cafe, Sweet Talk and many more other small players.. My colleague told me, the trend is in again, back in her school days, there were a lot more brands of bubble tea around. Then slowly one by one close down. Reason? Rental is the number one killer and also the operating overhead cost. You need volume, substantial volumne

So, invest in property la, every retail business needs space. So be the landlord. Infact I am looking for ppl to JV with in my next commercial purchase in Sg. Not now, but perhaps next year after I accummulate my bullet.

Every business also can make money, of course I know retail business is way to go, thats why I tried but didnt succeed cause not willing to forgo my corporate ladder.

Good luck in your business venture!