in any case, you need to bet first on the etherium and Bitcoin. There is such an assumption that Bitcoin Gold will also be very valuable in the future.
Bitcoin gold? nah.. it suffered from a 51% attack.
Bitcoin is the best choice and even you hold hundreds of altcoins that does have a small value its only opponent would be a single bitcoin. Ethereum is down as well so cheap rates can give you a good entry for it. Research and educating yourself in the market would lead you to greener pastures.