If you want a hugely speculative interest with significant potential returns, look at Encrypgen. It's about to launch to a much wider community. Once you've looked into it, consider where you think it will end up on Coinmarket Cap and us the following guide to determine your return:

Top 300 - This would mean DNA would need a valuation of $4.4m, a DNA coin value of $0.8 is required. That's a 1x on your original investment

Top 250 - This would mean DNA would need a valuation of $7.3m, a DNA coin value of $0.13 is required. That's a 1.7x on your original investment

Top 200 - This would mean DNA would need a valuation of $11.3m, a DNA coin value of $0.21 is required. That's a 2.6x on your original investment

Top 150 - This would mean DNA would need a valuation of $18.7m, a DNA coin value of $0.34 is required. That's a 4.3x on your original investment (vs 2.9 BTC return)

Top 100 - This would mean DNA would need a valuation of $39m, a DNA coin value of $0.71 is required. That's a 8.9x on your original investment (vs 2.9 BTC return)

Top 50 - Bold prediction!!! This would mean DNA would need a valuation of $112.3m, a DNA coin value of $2.04 is required. That's a 25.5x on your original investment

I wrote about it recently, which might be of help: https://www.reddit.com/r/CryptoCurrency/comments/796cfd/a_tiny_marketcap_token_with_massive_potential_for/?ref=share&ref_source=link