This is hard to say. I invested into Ethereum recently and have made 12% so far even the price declined since two days. I would suggest to invest in coins with an good uptrend or good tech. Some POS coins are interesting, too.
Why don't you hold your Bitcoins? The price is increasing and it is possible to make 2-5% every month only by holding your Bitcoin in your wallet.
any alt coins worth while kinda just looking for a 2-5% increase within the month
dogecoin and litecoin are really the only two i know and ethrium