I'd do a combination of:
1) $20k BTC purchase, $5k at a time over a few days.
2) $20k in futures contracts with either pools or forum members directly.
3) $10k in options either on an exchange or forum members directly.
4) $30k in mining equipment with Icarus in February.
5) $20k hedged in a combination of physical silver/gold instead, because the factors that would increase BTC would also increase those.

On the ones where you deal with forum members directly, look for those with established reputations only, anyone else, ignore.

You may want to also consider a purchase of $10k of GPUs here in the next two months or so and mining Litecoins instead. If so, I'd take $10k out of the futures contracts to fund that.