I believe that altcoins will show much bigger growth than Bitcoin, everytume when Bitcoin started growing, the growth was followed by altcoins that bringed higher profit to its investors than Bitcoin because they are more volatile 
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that's possible to happen but not for this time as bitcoin is still holding the crypto dominance. Altcoin needs to go more than 10x to surpass bitcoin and it's quite impossible to do hat in this decade. When altcoin gets increases and bitcoin too. It can't be predicted by us.