the biggest ever in percentage gains has already happened. it can't happen again otherwise alts would be worth more than everything in the solar system.
i expect a decent rally. i also don't see how many of the big ones can go much higher in the near term. they don't look like the greatest bets to me if you're in the market for huge gains.
Dont assume i meant the big caps like ETH. In fact i see a lpt.of big caps like NEO NEM and ETH dying slowley ober the next year.