What would be the most secure way for me to accept and hold payment in BTC and at the same time easiest way for potential customers to pay in BTC ?
Particular wallet on separate PC that only sometimes connected to internet?
mtGox with yubikey?
Payment provider ?
Something else?
It's hard to believe you are working on ASIC mining hardware and don't even know how to secure your coins.
How is your ASIC going? Will it be half the price of the competitors and use a die size of one tenth, perhaps?
ASIC is going good, Why would I sell short expensive equipment? It will be competitively priced based on a market. We will not be releasing specific chip information at this time to protect our competitive edge.
P.S. It's a 1nm process with infinity cores per mm2. You may salivate now.