As such, digital payments are expected to cross $1 trillion by 2025, while e-wallets are expected to grow from $22 billion to $114 billion in that same period. The joint study from Google, Bain & Co and Temasek shows only 104 million of Southeast Asia’s 400 million adults are considered fully “banked,” while there are 198 million adults in the region who have no bank account at all.