Alternative's 'fear and greed index' for cryptocurrencies has risen to 73, indicating a market sentiment that is still largely greedy. The index, which ranges from 0 (extreme fear) to 100 (extreme greed), is calculated from a combination of factors including volatility, trading volume, social media mentions, surveys, and market share. The rise in the index suggests that investors are becoming more confident in the cryptocurrency market, and that they expect prices to continue to rise. However, it is important to note that the index is not a predictor of future market performance, and that it can swing wildly in response to news and events. As always, it is important to do your own research before investing in any cryptocurrency, and to understand the risks involved.