------- is really very difficult.

It is price hike which is considered  to be a curse. (Infinitive);

People of low income do not know how to maintain the family at the time of price hike. (Infinitive Phrase); 

The businessmen ) stocking up products (Present Participle) are responsible for price hike.

Of course, there are some other issues  included mostly (Past Participle)   for price hike like Russian-Ukrain war.