That would work if I weren't so paranoid.
Things I do (and recommend to anyone where serious information or money is at risk):
a) Have at least one computer with no internet connection, and with only wired keyboard and mouse;
b) Build all apps that must be secure from source on the unconnected computer;
c) Create all keyrings on the unconnected computer;
d) Don't use an MS operating system for secure builds;
e) Transfer all data from the unconnected computer using only freshly partitioned and formatted media;
f) Only use media that has been subjected to a secure wipe.

BTW, don't use video card based mining hardware. Most video cards have been cracked. Some come from the factory with pre-installed viruses.