as we know that Binance has two projects, that is exchange and smart contract, then the total supply of BNB is around 160m and will burn every quarter, so the total supply of BNB will be less every quarter and with the current price of BNB ($410), then I think the price of BNB is still very low, because with a small total supply of BNB and BNB is one of the most popular projects (top 5 on coinmarketcap), then I think the price of BNB can still increase very high and reach at least $1500 (I think it's a decent price for BNB), therefore now is still the right time to invest in BNB and hold it for the long term, because at this time you can still buy BNB at a low price.
I agree that BNB has significant growth prospects in the long term, given the speed with which the Binance project is developing. But I do not consider BNB to replenish my portfolio, because its price, for me, as a small investor, is already very high today. I'd rather buy MATIC, which is more likely to give me a double profit over the same period.