not enough BTU's per pound of even liquified nat gas. The more carbon atoms per mole, the more energy for moving locomotives. Methane has only one carbon atom. Diesel fuel has 12 or more carbon atoms per mole. Natural gas will never be used as fuel for LOCOMOTIVES.....NEVER !!!!!
You obviously don't know about highly efficient gas turbine technology- or how much natty could be carried in a few tank cars.
Try doing some research and critical thinking before you post in the future.
I did sell my Berkshirre Class B shares only because I thought they have had such a great run-up and sitting on cash and studying the market that is up there and while it still may have legs I'd rather take the money and study then wishing I'd sold at the higher price. Besides the end of March and April seem to be great BEAR months and I also put alot in the PER & SDT! I like the leverage of cash to see where my next moves will be. I'm also up with an double in an biotech and one that is climbing and could be doubled soon. While I may be considered greedy sometimes, I have learned by past mistakes of seeing an frothy market and not taking some off the table. Keeps me satisfied!