If you want to go for a long term you better can pick gold because its a nice investment and most of times only goes up and in a long term its also profitable.
The bitcoin can be used for but term but I prefer a short term due to the fact the bitcoin is not very stable and also unpredictable these days.
Gold and bitcoin is the most appropriate investment for long term.
For short term investment, other altcoin are the best option since it was purely manipulated. Although it has risk like any kind of investment, people can consider this as one of their short term investment options.