In order to invest in cryptocurrency, it is not necessary to invest in ICO or IEO. You can invest in a cryptocurrency that is in the TOP 20 on the coinmarketcap website, or in a cryptocurrency that gives passive income. I do so.
In my opinion this is a safer way to invest in this market because ICO/IEO often have a lot of big risks and if not careful, you will lose a lot of money in this market. Investing in the top 20 coins does not bring much profit but if hold in the long term, the opportunity will still be available because the demand for investment in the top coins has been on an upward trend recently. I think it is advisable to choose only a few big coins to hold and clearly divide the capital in this market.
Risk is involved where there is lack of knowledge. When an investment is made without doing some research earlier, the results can be anything. That investment becomes a game of luck totally. IEOs and ICOs have been disappointing investors lately so my suggestion is the same. It is better to stay away from them. The first choice of any investor should be bitcoin as it is number one in all aspects.