I think most of the top coins have proven their honesty. I'm not selling my altcoins. The only coin that can disappear is bitcoin. Why? Because the violas objectively surpass it technologically and are of greater interest to the real world.
For me, altcoin plays a pivotal role in the crypto market. In fact, market capitalization is focused on bitcoin. But the new altcoin is the coin to meet the user needs most practical. Because the majority, built and refer to user needs. Altcoin helps traders in the market to easily find and invest or trade. The richness of the coin fulfills many user purposes as the development of the crypto community.