To increase altcoin, I think the trade is the best at the moment. Trade is able to make money spinning rather than holding a coin which keeps decreasing the price of the day ... May hold, as long as the altcoin has the potential after our trade is done.
Waiting for bitcoin pumps to get cheap altcoins in alt/btc pairs when they get dumped. Then, wait some weeks to see bitcoin get dumped and altcoins rise in alt/btc pairs to take profits (in btc pairs), then get more bitcoin in total. After that, repeatedly do those steps for rounds in order to increase your altcoins and bitcoin in total. It is not easy, actually, because it requires good control on your emotion and requires patience.