I remember hearing stories about usb sticks dropped in front of companies that were pre-seeded with virus' hoping someone would plug it into their companies network PC.
Probably Urban Legends.....or not
Definitely pick a specialty. The field is too broad for you to be a jack-of-all-trades. I started that way as a system admin and as our data center got larger I picked Storage and VMware as my specialty. Went from technical slave over to Pre-Sales Solutions Architecture and I now have trouble...
I reload for bulk target shooting (9mm, 45acp .223 and .38/357). But I purchase in bulk for quality 9MM 124gr HP, .22lr Mini-Mags, .45acp HP. And right now, prices are very good!!!! No one should have any excuses for future shortages (unless of course you have no money...).