People seem to have become millionaires in previous bull cycles with modest investments in BTC & ETH. If I invested in 1 BTC, is it enough to make me a millionaire by the next bull run, or are there an elite number of alt coins that could help me safely achieve what BTC & ETH once did?
Just like Wiwo mentioned, it just depends on where you reside. If you're from US or any first world countries, it won't make you rich at all unless miraculously Bitcoin just happened to surpass $500k at any of these days right now. If you reside in third-world country, it would be more than enough to make you a millionaire let alone just by investing to it surely makes you a millionaire already like let's say for example here in my country, 1 BTC is equal to 1.1 Million PHP.
Out of curiosity where did you get the conclusion that BTC and ETH made people millionaire in the last bull run?