Yes it is true that there are many investors among us who wait to buy bitcoins at low prices i.e. they wait for the market to dump.
Investors who wait for market dump to buy can be classified into two types.
The first type: They will actually buy in market dumps, buy dips and they're experienced investors who will not be fearful and panic during market dumps.
The second type: They will turn to be fearful and panic and refuse to buy in dips. They're inexperienced investors and they will need more time to familiar with them, understand this market and get rid of fear and panic. Or they will need to use another strategy that won't rely on their emotion.
These investors may not have to wait for Bitcoin price to dump if they use DCA strategy in their investment. The DCA strategy will always give you an opportunity to buy bitcoins if you have enough budget and you develop a habit of buying bitcoins regularly. Even if you have enough funds, you should invest regularly, even if it is a small amount, without waiting for market dumping.
DCA is a strategy for a second typed investor as this strategy requires them to assign investment capital and buying on regular time basis.
Experienced investors can combine regular DCA and dump-waiting to buy dips but to succeed, they need to have two capital parts for two tasks: regular DCA and dip purchase.