Rebalancing involves two main steps. First, you must set your desired cryptocurrency portfolio allocation. This might be a 50/50 split between Bitcoin and Ethereum, for example, or a more complex allocation involving numerous coins. This step is highly individual and should be based on personal investment goals, risk tolerance, and beliefs about the future performance of different cryptocurrencies.
Next, you'd periodically adjust your portfolio to match this desired allocation. This could mean buying more of a cryptocurrency whose value (and thus proportion of your portfolio) has fallen, or selling some of a cryptocurrency that has risen in value.
The frequency of rebalancing can also vary based on individual strategy and market conditions. Some investors might rebalance their portfolio weekly, others might do it monthly or quarterly.
Keep in mind that while rebalancing is a proven financial strategy, it's not a guarantee of profits especially in the highly volatile cryptocurrency markets. Rebalancing can help manage risk, but it cannot eliminate it.