There is always good time to buy Monero.  Right now we are waiting or new wallets with latest updates that are already developed. Most important feature of last upgrade is multisig. Something that is very important for exchanges or merchants and specially decentralized markets.   There will be ofcourse a lot of other features as always are. Monero is after Bitcoin and Ethereum most developed coin.

After that 2018 will be super rich with new things in Monero with several Hardware wallets support and drastic reduce of transaction fees and transactions sizes with implementation of Bulletproofs.