Sounds very dangerous to me.
Never put more than pocket change on your hot wallets!
Pocket change is for everybody different, but I would say 1BTC is more than enough for most things.
Yeah I only have 1BTC on there, the rest is in cold storage. I view smartphone BTC in the same way as "cash in my pocket".
You're using a service that is notorious for ripping people off with outrageously overpriced coins and complaining that the concept of replenishing doesn't work?
I don't follow that logic.
Use a service where you get your coins at market value. Obviously.
Such as? Pretty unhelpful aggressive comment. I'm in UK and I await your recommendation for an economical way of replenishing (not holding my breath).
Hoard with the rest of us greedy bastards

I have been doing this and bought a few computer components with BTC, and I went to buy some more components with BTC and then stopped myself because of the 5-6% premium for using BTC. The UK has a very efficient payments system created by the banks, so the incentive to use BTC here is less than it is in the US. I can transfer money between accounts here for no fees, pretty much instantly, even between different UK banks. I will continue to invest a small amount per month in BTC and just hold it until the incentives change (if they ever do).