In most instances, people invest with a portion of each paycheck; there is no lump sum available. If you do have a lump sum and want to invest it, go for it. I stand by it for withdrawals, though. You need to have a prudent cash reserve, and liquidating on a regular schedule is a good way to do this. Or just stop reinvesting interest and dividends.
Investing as a lump sum supposedly beats DCA even when adjusting for risk, via the Bogleheads forum, referencing a Vanguard study
In most instances, people invest with a portion of each paycheck; there is no lump sum available. If you do have a lump sum and want to invest it, go for it. I stand by it for withdrawals, though. You need to have a prudent cash reserve, and liquidating on a regular schedule is a good way to do this. Or just stop reinvesting interest and dividends.