No bitcoin
mockery discussion is complete without a mention of the fact that Mt.Gox was originally Magic: the Gathering Online Exchange.
A magic online card trading site becoming the major bitcoin exchange is hilarious on its own, but somehow the people runing it seem to have become less competent at coding and security in the process (or maybe it's just full of scammers like many things in bitcoin land)

Regarding bitcoin itself, bitcoin tends to get advertised because
1) no regulation
2) it's deflationary (Ron Paul 2016 End The Fed, wake up sheeple

)
3) no chargebacks
4) fast transactions for free
No regulation? Gee, that seems to be working out perfectly well since all actors in a free market are rational and, in all transactions, have perfect (or sufficient) information. Anyone breaking the rules will get caught by The Invisible Hand of the market, people refusing to trade because of scammer tags and ~reputation~, or hired hitmen, depending on who you ask.
Deflation? Ah yes, many economies have benefited from long term deflation, such as ___________ . An economy is not at all healthier or more able to grow if money is used instead of hoarded, and "I have 2% of all bitcoins so I should hold onto them and be worth 2% of the future world economy" is a reasonable and productive thing to advocate. Oh, and infinitely divisible bitcoins (by adding more decimals to your balance, so you can split it into smaller units) are not a roundabout way to inflate your way out of deflation related problems in any way, no sir.
No chargebacks? Overall,
scammers and shady businesses Captains of Industry win, customers lose. If everyone's honest, it makes literally no difference.
Fast transactions? Sure, everyone waiting about 10 minutes at the bar for the transaction for their pint to be confirmed sounds like a good idea! Also there's totally no fees, except for the fact that transaction fees are a thing and transactions not paying the fee tend to get stuck in the queue for days.
e: In addition, the blockchain thing itself is a problem. IIRC, it currently hovers at around 15 gb and would grow by terabytes every day if it actually included all the transactions happening worldwide...