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Anything you have experience in that you can teach..your style of literal examples is very effective :)) you could always start a block-chain course and link it to IT stuff :)

Blockchain I fear may be overrated in real world already. Some thing requires just a database and people are now starting to try to complicate it. :-)

hehe perhaps..I'm in the midst of proofreading my cousin-in-law's master thesis on blockchain and a related proposal..will see just how complicated it gets ;)