As it is always said, slow and steady wins the race. Ethereum may be slow in adopting new upgrades, but it's been stable as a smart contract platform for the mainstream world to use. Developers have been extremely careful in launching specific network upgrades that would result in the instability of the ETH blockchain. In some sort of way, the market has reacted negatively with ETH's delay in the Constantinople upgrade. However, all could change once Ethereum makes the switch from PoW to PoS.
Current prices are a bargain if you consider ETH's ATH of over $1,000 by 2017. The bear market caused by Bitcoin has affected many altcoins that were in their ATHs. Ethereum is one of those altcoins, as it depends on Bitcoin's growth to succeed. I believe that the next time Ethereum will rise again, will be such when Bitcoin rises to astronomical levels. Only then, Ethereum could retain its second place in market cap, while other cryptocurrencies stay behind.
Nonetheless, investing in ETH at these prices will help you obtain bigger profit in the future. Add to this, staking your ETH for extra income, and you'll be able to double or even triple your investment in no time. Despite this, it's always recommended to do your own research before investing based on someone else's opinion. Just my thoughts