Bad news for cobalt miners

How does one keep up with technological changes? Cobalt is needed in lithium cells. Is it? The latest is that it can now be replaced by the much cheaper (but heavier) iron.

I only accidentally came across that news yesterday so today, I got rid of all my cobalt shares...  They collectively has made me phenomenal profit within 3 months.  I have transferred the sales into buying/topping up technological stocks.

Last week, a company had to 'advertised' their mishap with their cold storage, resulting in food poisoning.  So I bought shares in a company that has found a niche in monitoring refrigeration to avoid dangerous errors when faults occur without the owner knowing.