This article is about blockchain news, trading news, and technology news.

Bitcoin (BTC) bulls are trying to start a Santa Claus rally by pushing the price above the psychological $100,000 level, but higher levels could attract sellers. Bitcoin gained about 2% in December, according to CoinGlass data, but it will need to make more efforts to match the 12.18% increase from December last year.

CryptoQuant contributor Joo Hyun Ryu noted that Bitcoin demand has increased from short-term speculative investors and Korean investors. The share of short-term investors increased by 3% in a week, and the "Kimchi Premium" - the price difference between South Korean exchanges and others - reached 5.12%.

However, Bitcoin's rise is not guaranteed as US-based spot Bitcoin exchange-traded funds (ETFs) continue to bleed. According to CoinGlass data, there has been a net outflow of about $1.52 billion from ETFs since December 19.

What are the critical support and resistance levels to watch for Bitcoin and altcoins? Let's analyze the charts of the top 10 cryptocurrencies. Share your views in the comments.