HOLD or SELL
I`m very worried about Bitcoin Cash.
At your rank you already have 70 BTC ? Wow. You do trading or mining? If signature campaign that is impossible.
70 BTC? Seriously? What a rich person. If I were you, I will just hold it than sell it. Bitcoin is growing so fast each day and I am very surprise that it is now 13K USD. But according to what I have read bitcoin already hits 14K USD. It only means that as the price of bitcoin grow, your earn profit and since it grow fast you earn fast.
About the bitcoin cash? What are you worrying about? Its price? That it may pass bitcoin on the days or months to come since it already passes ethereum? Well I think you have nothing to about. Up to now bitcoin is still the number one and the leading crpytocurrency.