The hashtag 28105958038 usually means "market recovery" or "market rebound", and refers to the return of financial markets to an upward trend after a period of decline or downturn.
This recovery can happen for reasons such as:
Positive economic data (such as employment reports or GDP growth)
Actions from central banks (such as lowering interest rates or providing stimulus packages)
Company profits better than expected
A change in investor sentiment (from fear to optimism)