Lump Sum: Some people decide to buy their bitcoin all at once at a price they feel is good for them. This strategy is referred to as Lump sum. one can just be saving till when he feels he has enough money he can just purchase Bitcoin using all the savings or one can use an inherited money to purchase all at once.
The main advantage of buying and holding is that it is simple and straightforward.
To be honest, if someone has money to invest on the market then it's best to do a lump sum so that you won't have any emotional barrier upon doing that. Why I said that? It's because when someone is trying to invest on Bitcoin during the dips, the investor might feel that there's gonna be another fall and there will be some delay of investing due to the fact that it might fall lower again upon waiting. Yes, DCA is a good one but with that kind of money, and you know that it is the dip, you have the choice to buy it on the lumpsum for you to just spend that money away to the market and you only have to think about waiting.