There are only two things that affect SOL to increase, first because of an increase in SOL demand, and secondly because the cryptocurrency market trend is still very positive to date, because when the positive trend starts to decline in cryptocurrencies, surely the demand for SOL coins will also decrease and that can greatly affect the price.
When the market is positive all the coins will move higher and whenever there is a correction the entire market would go down along with it and that is the case with SOL as well. For me i did not personally see this coming when they conducted their initial sale i stayed away from it thinking the price is high to make these decisions and now i missed the entire opportunity to invest.