For me the biggest advantage of bitcoin is the confirmation why we are waiting? I dont know why we need to confirmed transaction before use bitcoin.? I want instant like the other altcoin . Because sometimes many bitcoin user wait 1-2 days more before the transaction confirmed. Like me my last payouy in my signature campaign I wait 2 days before I use my bitcoin what if I need my bitcoin now. But sometimes the transaction is good but I want everyday.
Yes, this is the main drawback of bitcoin which appeared with the increase in the number of users. If you do not improve the system, then in due course because of the increase in users, the waiting time can still increase.