In most cases, altcoins can really be considered a speculative coin, which today still has a lot of positive aspects. It always happens in different ways, but sometimes it happens that altcoins can be considered a good start.
However, the most speculative coin is bitcoin. Not having good functional qualities, with seven transactions per second, it still has a level of capitalization with such a large margin from the rest of cryptocurrencies, because before that it had grown very well in price. This was shown by one of the polls of Bitcoin holders when they were asked if they would invest in Bitcoin if they knew that it would not increase in value. Almost everyone replied in the negative.