All these 3 Altcoins you mentioned are OG coins and they all have niche that they served in the space. Doge is the most successful Meme coins in the space and being championed by Elon Musk, Litecoin is what Silver is to Bitcoin and as long as there is demand for Bitcoin, Litecoin will continue to shine, Monero is an OG privacy coin and the one that truly stands out from other Privacy coins being a true  and complete dark transaction. Anyone that do not wants to take huge risk can buy into this 3 coins they will surely come good