hold until you become a bag holder... holding a coin/token have a specific time and value if you think youre holding too long as the value goes up and down then you are waiting forever be wise there is nothing wrong with holding as long as you earn while having it 
Hold and hold , buy more bitcoins if you want and then stay calm, everything will be okay and will go to the right place. Keep calm because if you are not, you will going to lose everything due to emotional breakdown of yours. Market is frustrating we need to stay calm.