Altcoins have a much bigger potential than BTC and one of the most popular altcoins is going to overcome Bitcoin within the next several years. Just hold your altcoins and follow the market, we will see the green light soon.
coins that have great potential in my opinion are also difficult to overtake Bitcoin, because Bitcoin will still be the king of coins and different from Altcoin. The best Altcoin has great potential and will benefit you, but it cannot replace Bitcoin or take over the value of Bitcoin. Bitcoin and Altcoin will be equally useful and complementary.