[hndamien]

Would you call Bitcoin a "toy"? If so, it really is just saying that it is likely to be something you are initially dismissive of.

[mch82]

World of Warcraft Gold & similar in-game currencies are toys.

Bitcoin is not a toy, but follows in the footsteps of those toys (in addition to traditional currencies).

[CryptoPunk]

Bitcoin started off as a toy, with 10,000 being exchanged for a pizza once. Ethereum smart contracts, even ones dealing with cryto-asset-exchange, are often treated as toys