the possibility is still there as long as you hold the top altcoins in the market especially like Ethereum, Binance, EOs, Litecoin, Polkadot, Xrp most of them still have a chance to increase their price even higher than the current price. moreover knowing that BTC has pumped in over $ 18k I believe that this could affect the prices of other top altcoins as well.
Forecasts are just a guess. No one could have predicted that bitcoin, let alone altcoins, would show such dynamics. According to statistics, such cycles occur every four years. This may indicate that an equally exciting cryptocurrency race is waiting for us in 2021. 2021 will be an interesting year.
I assume that after repeated attempts to set the price of bitcoin above 20 thousand dollars, its price can be adjusted and this will lead to the beginning of the altcoin season. Most of the top altcoins have great potential to reach their ATH, but whether the altcoin season will be as long as you write, will still depend on bitcoin.