Cryptocurrency market is filled with good project that want to make difference in economy, finance and business. However there will be bad player in every worth endeavour. The onus is now on investors and traders to be able to distinguish legit project from scam project .The successful altcoin out there usually take years before they become successful and they don't promise people of instant wealth!
There are also many altcoins that have increased in just a few days after they were launched, that's where people are easily fooled by such patterns.
nothing is safe in the crypto world, everyone has their own risks.
Before getting into altcoins, try to choose an altcoin that has a usability that is acceptable to the market.