Most Europeans have unfavorable views towards gypsies But, as it turns out, Romanians have a lot of trouble distinguishing gypsies from Romanians Accordingly, lots of gypsies have motive and ability to "pass" as non-gypsies, and the most well-off among them are the ones who do:

The majority of well-to-do gypsies swap the ethnicity they identify as on census forms as they grow up. They disassociate from their communities, unlike other minority groups like Hungarians, who reliably identify as what they really are.

The gypsy population is thus underestimated, but more interestingly, those who identify as gypsies are more likely to fit with the poor, uncultured stereotypes. Thus, through being stigmatized, a process might be unfolding that makes gypsies who identify as gypsies worse!