Today’s blockchain and cryptocurrency news 
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Bitcoin is up 1% at $47,271 
Ethereum is up .5% at $3,946 
and Binance Coin is 1% at $534

Decentraland up 18%

Polkadot Parachains are live. 

Sotheby’s picked up 100M this year from NFT sales

Open season on Optimism. 

Silverflow closes $17M series A.Links:<ul>
<li>
<a href="https://www.coindesk.com/tech/2021/12/18/polkadot-parachains-go-live-capping-yearslong-tech-build-for-ambitious-blockchain-project/">Polkadot (DOT) Parachains Go Live, Capping Yearslong Tech Build for Ambitious Blockchain Project</a> — Ultimately, Polkadot will offer 100 parachain slots</li>
<li><a href="https://www.theblockcrypto.com/post/127739/payments-startup-silverflow-closes-17-million-round-led-by-coatue">Payments startup Silverflow closes $17 million round led by Coatue</a></li>
<li><a href="https://www.theblockcrypto.com/linked/127891/ethereum-layer-2-optimism-removes-whitelist-opens-to-all-developers">Ethereum layer 2 Optimism removes whitelist, opens to all developers</a></li>
<li><a href="https://www.theblockcrypto.com/linked/127649/sothebys-netted-100-million-from-nft-sales-in-2021-report">Sotheby’s netted $100 million from NFT sales in 2021: report</a></li>
</ul>
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"Dubai World Trade Center to Create Crypto Hub" - December 20, 2021

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