Crypto from 1998 with zero market cap?
Bitcoin started its development since 2009 and later got the market cap around 2011.
What other trends will have the biggest impact over the next 18 months? And which altcoins hold the most potential amongst the community and why?
Trend changes from year to year but bitcoin's popularity isn't changing. The attention of the crypto market goes to him.
Best performing altcoin in 2019 i think is binance coin/BNB
If investors will stay to IEO and there will be no better exchange than BNB, they will dominate for the next 18 months.