Basically, there is no pin point time frame for this, Alts like LEDU, Vechain, XLM, whatever project would have to have a huge influx of funds before they're independent on it's own.
I'm not familiar with LEDU and Vechain and I hope these coins will have a better future cause think about XLM, feel doubt about it.
Actually, I save some XLM last year after the bull run but I don't see anything that it makes a pump instead of seeing it down. It may be because of the market situation but only I just hope that I can manage to hold it long.