A bunch of thoughts/questions on this subject:
1) Are Canadian .999 nickels good enough for car batteries? I am assuming so (because of the purity) but is there perhaps something else that would make it difficult (or very expensive) to sell (ultimately) to a refiner? Also, would a refiner accept a small quantity, or do they need a minimum of a ton at a time to make it worthwhile to them?
2) I am assuming that U.S. nickels (only 25% nickel) would not fit the bill for being capable of being used in batteries. Costs to extract the nickel portion of the coins would likely be VERY PROHIBITIVE.
3) For those looking to play stocks of the miners, that can be VERY tricky. There are some large miners (Examples: Glencore and VALE)that produce a lot of nickel, yet the nickel is a very small percentage of total output. So buying the stock just because of nickel would be like buying G.E. because they make light bulbs.
4) The largest nickel producer I know of where nickel is a substantial portion of their revenues is Norilsk. I am writing a book on stock trading and have a chapter about Norilsk where I say "The name is "Norilsk"- it is NOT "no risk"". The risk comment pertains mainly to Norilsk being a Russian company.
5) All it takes is a comment from Tesla saying they are having a hard time procuring enough nickel for their batteries and the price of nickel could move quickly and substantially.
6) We are nowhere near the all-time high (well above $20 US/lb.) price of nickel, so IMHO it could double pretty easily and still be nowhere near the peak.
7) People tend to overreact to good and bad news. I imagine some of the lower grade nickel companies could be subject to being sold off to perhaps ridiculous levels just because their nickel is deemed unsuitable for electric cars. That might be an opportunity, as nickel has other uses such as an alloy for steel, etc.
I own a decent amount of .999 Canadian nickels and have for some time. No interest whatsoever in selling anywhere near current prices thank you.
If I was homeless, I could always hold a sign that says "No job. Will trade my nickels for rides in your Tesla."
Former stock broker w/ ~20 yrs. at one company. Spoke with 100k+ people and traded a lot (long, short, options, margin, extended hours, etc.).
NOTE: ANY stocks I discuss, no matter how compelling, carry risk- often
substantial. If not prepared to buy it multiple times in modest amounts without going overboard (assuming nothing really wrong with the company), you need to learn more about the market and managing risk. Also, please research covered calls (options) and selling short as well.