If you have good trading skills and you have time to do some research in alt coins (and of course if you are ready to lose your BTC just in case), you can try trading alt coins to multiply your BTC holdings.

If not, just put them in the cold storage and wait to see if Bitcoin gets momentum in future. With signature campaign I'm sure it will be a small amount and selling it at these low market price won't give you much.

HODL !!