I think, the top crypto is still bitcoin, even though there are still many crypto that can provide profits, such as ETH, TRX, RIPPLE, DGTX. I have proven it, because i always trade by using those coins. But crypto ico can also be promising, as long as is not an ico scam and coins are always traded on the market. But remember to be careful and not in a hurry to make decisions, both in buying or selling, because that's the most important thing in investing or trading crypto.