Hello. I have a folio of BTC, ETH, NEO and some alts. I've been watching at Bitcoin since 2015 but bought only at this summer (and the last move was quite bad, I bought some BTC for $4600). I try to study, watch vids, read forum and twitters. Chris Dunn has a vid on the topic but nothing really specific. I'm interested in some ideas about what to do when prices are falling. Sell alts and hold bitcoin? Short? (and if yes, so the next question is how to learn how to short?).
It entirely depends on your risk taking capability and also on your goal. If you are thinking about long term, then you should go for dollar cost averaging method. You can buy more bitcoins at a cheaper price when the price is falling. It will bring down the portfolio risk as well as the average buying price of bitcoin. I mean that is only feasible if you have a long term outlook for bitcoin.
I don't think, short selling is available in any crypto exchanges. At least I don't know. So if anyone can tell us where the shorting is available that would be a great help. So without short selling method, dollar cost averaging is another wise thing you can do.