As a newbie who have just started your journey into bitcoin investment, the fastest way to grow your bitcoin holdings is to buy periodically.
When buying periodically, (that's employing Dollar cost averaging strategy), you reduce the risk of being anxious about market volatility. You are not concerned about how much price is, And what the market is doing at the moment, rather you keep stacking your bag time to time.
You will be surprise howfar you have gone in less than 1 year. I think this is the best strategy for beginners.
If you have a better way of stacking your holding, please you can discuss in the comment section.