Bitcoin is good for buying many things, including illicit drugs for some reason. Instead of buying some illegal internet weed, why not use those hard-earned Bitcoins to go and buy some geeky cufflinks from a local vendor?
The store is called Cufflinked, and they have everything from cufflinks with mechanised gears, right through to cufflinks that can help you bust out of handcuffs when those kinky nights go awry, perhaps.
There's even a pair of cufflinks that lets you store up to 4GB of data.
Stylish, and geeky.