It is best to hold on to your coin and you can also buy some altcoins. Since you have said that the coins are going down and you bought your btc at around $11k, you will just lose more if youll sell it. It is a good idea to buy some altcoins while the price is down, because sooner or later, the market will stabilize and increase the price of coins.
Same here. Just patiently hold btc and deliberately buy alts (backed with proper research). That's what my plan anyway.