Or is it better to make a fixed investment of 2,000 per month for 5 years?
It mainly depends on your view of the market.
If we believe that after the current deep decline, we have reached a phased bottom, and the stock market will rise in the medium to long term in the future, then the one-time investment income must be far greater than the five-year fixed investment.
If you think there will be a longer period of recurrence, fixed investment is better.