I think 80-90% of altcoins will worth nothing at the end of year. I prefer to hold Bitcoin or Ethereum.
This is why I prefer most with bitcoin and just forget and abandon most of my altcoins and sell it. Most of the scams can be found through ICO's, there's a big hype of the ICO and it is making the whole crypto market big because projects are popping like mushroom everywhere, every hour.
In the aspect of it making the whole market big though, it is not bad, since that is giving the cryptocurrency space some attention from investors, but the diversion the whole ICOs, both the scam, shit and good ones have been creating sometimes from the real deal can be appalling and that is causing so many investors to start getting greedy, but at the end of it all, as long as some of us know how to play safe around it, then we should be fine without forgetting bitcoin as the main focus.
For someone like me, knowing cryptocurrency as a scam is even more heart breaking if I end up falling prey out of stupidity to scammers. I have been investing in ICOs now and I have never gotten scammed for once and as long as I keep doing what I have been doing, then I will always be fine which is making sure I investigate the team thoroughly before anything else. I do not need to have all the coins; just the right ones are good enough for me.