As a newbie to Bitcoin investment, you don't need to bother yourself with knowing what the price of Bitcoin will be instead, your interest should be how to buy Bitcoin and store it properly for several years. To do this successfully, you need to make your final plans to enable you buy Bitcoin with only money you can afford to leave in Bitcoin for many years like 5 to 10 years without having urgent need of it. You will also be better off if you set aside some funds called emergency funds to help you protect your Bitcoin, this funds being what you will lay hands on incase you have something that came up unplanned which you must fix.
One method of buying Bitcoin that is generally recommended for a new investor is the DCA method which requires buying Bitcoin with a convenient amount of money on a regular basis like weekly or monthly. If you have a regular cash flow like salary, this method is easy and straightforward to apply because it will just require you to calculate a certain percentage of the salary that you can put into Bitcoin and no be in any financial stress. If you income is not also regular, you can still work out a way of using the DCA method but that will require some extrapolation to achieve a definitive amount to commit to Bitcoin per period of time.
Once a newcomer has made up his mind that he is going to invest in Bitcoin then he should plan a strategy on how to start accumulation Bitcoin. The best strategy that suits most of us is DCA since many of us can't afford a Lump Sum investment though Lump Sum is more profitable then DCA in the long run. With DCA the main benefit is that if we have extra cash available in our 5 years or more journey of investment then we can invest that. Moreover with time our understanding about Bitcoin increases and we are in better position of managing cash that goes into Bitcoin every week or month.
People now buy bitcoin, just for the sake of having bitcoins, looking at mainstream... at least most of them.
It's better if you invest something for future, if it's 'Lump Sum' then it's much better if investment is made once, and headache of buying through DCA (Again, and again), even better if you had invested huge sum when it's bear market (But we never know how far the market can fall, or rise after the investment...).
If you go risk-wise, then investment made through DCA will be less volatile than a 'Lump Sum' investment...
However, I'd prefer a combination of both (If asked)... Lump Sum when there's a massive amount at my disposal (and the condition of the market is favorable for the investment), then smaller investments through DCA whenever I can.The idea and concept of the Lump sum buying entails buying right away, it has alot to do with investors decision to invest right away with the available huge amount without considering market condition, maybe you are describing buying the dip instead of a lump sum buying, for an investor the market conditions is always favorable to buy Bitcoin provided that the investment money is readily available for investment, for me I prefer making investment decisions based on the available discretionary income rather than based on the market conditions.