A good medium term investment will be both options. Now excellent prices for buying, so you can buy. The market has long been in a downtrend, so in the medium term, you can count on its rise. If you plan to invest in crypto currency, bitcoin will be an excellent solution. As for the altcoins, they will also grow after bitcoin, the main thing is to approach the choice of coins intelligently. It is best to choose the coins from the top 30.