1. Broad institutional adoption: Many large financial institutions have started adopting cryptocurrencies as part of their investment strategies. The entry of companies like PayPal and Tesla has boosted confidence in digital currencies like Bitcoin and Ethereum.

2. Technical updates: Major developments in cryptocurrency networks, such as updates to the Ethereum network (Ethereum 2.0) that promise to reduce costs and increase speed, making it more attractive to investors and users.

3. Hedging against inflation: With inflation on the rise in some major economies, cryptocurrencies like Bitcoin are seen as a hedge against inflation, as they are decentralized in nature and are not affected by central bank policies.

4. Media interest and speculation: Increased media hype around cryptocurrencies can drive individual investors into the market, contributing to higher prices.

How long will the rise last?

It is difficult to accurately predict how long a price rally will last. In the cryptocurrency market, prices are usually highly volatile, influenced by factors such as government policies, technical updates, and general investor sentiment. However, there are expected corrective cycles in the markets, where some pullback is expected after each strong rally.