There are currencies for long-term investment and there are currencies for short-term investment. You choose what suits you best. If you like to trade, invest in currencies, which can give a sharp jump up. Invest when the currency is in decline. Analyze charts. The coinmarketcap website will help you.
Go on and do not get attracted by negativity which can affect your life here and we know that everything is responsive here if you know how to make yourself able for a work. Always keep yourself positive and follow the basic market rules so that you may survive in your work. Exchanges are many and coins are a lot but all we need is to get knowledge and to place money on right source.