You cant grow bitcoin in gambling because gambling is very risky which their is no assurance if you will have a  win, the best way for you to grow bitcoin is by hodling. By hodling your bitcoin their is a better assurance you will gain profit if only you can make a good decision and have patience, this is the easiest way of growing bitcoin.  Gambling is never an option to grow bitcoin,  it is a way to even lost your bitcoin because winning is under probability.  Using a non-custodial wallet is the safest and best place for you to make a longtime investment in bitcoin. I'm sure the reason why OP thinks gambling can grow bitcoin is because he wants to make money quick. It is better to choose a longterm investment that will benefit you than to lose all you have to make quick Money.