Lump Sum Investment or Dollar-Cost Averaging for $100K? Seeking Advice

Hi Reddit community,

I've got around $100K in cash that I'm looking to invest. I've done some research on the S&P 500 and all-world ETFs, and they seem like less risky options in the long run. However, I'm a bit unsure about the best approach to investing this amount.

Should I: 1. Invest the entire $100K in a lump sum, or 2. Spread the investment over time through dollar-cost averaging?

While it feels a bit scary to invest the entire amount at once, I've read some blog posts from Vanguard and other investment companies suggesting that lump-sum investing tends to be more profitable based on research.

Additionally, I've come across the Vanguard LifeStrategy ETF, which includes both stocks and bonds, seemingly offering a balanced approach with lower risk on paper.

What are your thoughts on this? Has anyone faced a similar dilemma? Any insights or experiences with these strategies would be greatly appreciated!

Thanks in advance!

Edit: a bit more context - Living in Netherlands - Single - right now, i put it into savings account