It will be safe for you if you are choosing Eth for your investment or holding. Because Eth is the second to the value for now and this your I think Eth will rise up until it can level us a Btc. However, you can hold Bitcoin and Ethereum for short term as well as long term. They'll always give you profit. I would prefer long term.
There are two options to opt when things are down in market. If bitcoin price is down, you could buy bitcoin. More bitcoin would help you to implement this rule of buy low and sell high. When you buy low, it will absolutely help you to make good money on selling. Best efforts should be make for finding a suitable coin and suitable exchange to do the practice. Good luck to you everyone.
Finding luck was too hard to catch unless you're picking the right coins to hold and I am referring here to ethereum and bitcoin. Aside from altcoins around the crypto market, it do help a lot to increase your profit day by day. But I don't think it would surpass what bitcoin really have provided us for a long time potential gains.