While BTC and ETH are clearly leaders right now

If you're looking at the best possible gains - I'd say that they are rather "safe" investment, than a "money maker". Its like S&P500 stock.
You could do couple of X's at best, but like not much more than that.
Because everybody knows how awesome it already is. So all its features are already priced in

Meanwhile lowmarketcap coin like XSPEC (or Spectrecoin) is a type "of your secret gem" (return wise, great USP technology/very low market cap) investment

Take a further look

XSPEC is currently priced only at 6 million market cap,
with a determined on Stealth Staking technology (call it Proof-of-Stealth if you like it) professional team

I ve got a couple of arguments to consider in my opinion of why XSPEC will be massive:

First - it has USP (unique selling product) which is Stealth Staking (while Monero is on PoW)
Second - the price already hit 6 dollars at once, but with a change of the dev team and project management, that has created uncertaintly among users and overall bear market, it ultimately felt to where it started.

Now it starts to gain momentum back again:
- Last one or two months many Articles start to come out (Crypto community that specializes on research starts to notice)
- WhitePaper
- New Website
- Constant new version clients and work on automatic builds
- Stable funding mechanism
- GitHub activity

All those things point out that we have a potential "winner" here at current entry points, and can give you way more than lets say x3 x4 a BTC or ETH can give you