Dia data seems to be a legitimate project which is trying to penetrate the Oracle space in blockchain but I feel that projects now are overvalued because of the bull run and people are just booking their profits.
That is the thing, a project can be very good and offer great perspectives for the future and yet it can be overvalued and it is a bad idea to buy it at that moment, think of what happened in 2017 when bitcoin was close to reach 20k, was bitcoin a bad coin at the time? Of course not, it was and keeps being the best coin in the market, was it a bad idea to buy it for 20k in 2017? Yes it was, and anyone that did it paid the consequences of that mistake, DIA seems like a decent project and its value is very low compared to its ATH but it could be a good idea to wait until it goes even lower, and if it does then that could be a good moment to try to buy some.