Why did Igor Stravinsky compose many works during the 1920s and 1930s for himself to perform?

Igor Stravinsky composed many works during the 1920s and 1930s for himself to perform primarily because he was compelled to earn his living as a concert pianist and conductor after losing his property in Russia during the Russian Revolution.1

Following his move to France, these compositions—which include works such as the Concerto for Piano and Wind Instruments (1924) and the Piano Sonata (1924)—allowed him to maintain financial stability by serving as vehicles for his own performances.1