there is a bak kut teh at Sultan gate road...had it the other day..good stuff....http://ieatishootipost.sg/leong-kee-bak-kut-teh-klang-style-bkt-anyone/
you do get soursop in NtUC once ina long while.
i dun think it is profit reason etc...soursop is just seasonal and you really cant get it all year round.
Good strategy but the problem is that few if not none can have such 100 percent discipline.
just 1 time indiscipline...your own capital is wiped out with even more losses