Ordinals allow for on-chain surveillance analysts to cluster wallets and identify Bitcoin users with greater ease, which some people may disagree with.
Finally, there’s potentially a risk of creating a derivatives market that could upset BTC prices. If Ordinals were to take off in a big way, there’s the possibility that users spending big money on specific millionths of a Bitcoin could have unforeseen effects on the price of Bitcoin and the health of the market, although this is merely speculation at the time of writing.
Whatever happens with Bitcoin Ordinals, the technology has been warmly welcomed by a great many cryptocurrency enthusiasts, and the market looks set to develop further over the coming months and years.