I have several millions now, with probably 8M in cars + mods, a boat, a jet and have maxed out the weapons I currently have available. I can easily spend 20k-100k a session in just ammo, Merryweather, help from Lester and repairs so budgeting that kind of spending it obviously won't last forever and missions are like pocket money so you have to glitch IMO. Unless the credit cards are very reasonably priced you'd be mad not to glitch while you can, to set yourself up for the future. What if they release some rare cars later on at 5M a pop, a 1M apartment or the fighter at 10, 20M?