You never need to worry about buying at dips when you are confident about the fundamentals of bitcoin. These days people are like you because after watching two cycles of bitcoin, they are believing that catching at the bottom of each cycle is easier but market is always known for surprising us which means you may not be able to catch exact bottom all the time and when you are about to be missing out the bottom of one cycle then buying regularly on available dips is highly recommended to ensure you are not missing out good buying opportunities.