Price analysis 12/21: BTC, ETH, BNB, XRP, DOGE, ADA, MATIC, DOT, LTC, UNI

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This is a companion discussion topic for the original entry at https://cointelegraph.com/news/price-analysis-12-21-btc-eth-bnb-xrp-doge-ada-matic-dot-ltc-uni